A026649 a(n) = T(2n,n), T given by A026648.

1, 3, 8, 36, 114, 558, 1856, 9384, 31942, 164322, 566928, 2948184, 10262004, 53761068, 188306112, 991821456, 3490234182, 18458523378, 65190481904, 345875613144, 1225052975644, 6516499594212, 23134851823872, 123325174525104

Offset

0,2

Links

Table of n, a(n) for n=0..23.

Crossrefs

Sequence in context: A020099 A182392 A005635 * A148919 A087905 A295103

Adjacent sequences: A026646 A026647 A026648 * A026650 A026651 A026652

Keyword

nonn

Author

Clark Kimberling

Status

approved